sha2.h File Reference


Detailed Description

Copyright (C) 2006-2009, Paul Bakker <polarssl_maintainer at polarssl.org> All rights reserved.

Joined copyright on original XySSL code with: Christophe Devine

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

Definition in file sha2.h.

Go to the source code of this file.

Data Structures

struct  sha2_context
 SHA-256 context structure. More...

Functions

void sha2 (unsigned char *input, int ilen, unsigned char output[32], int is224)
 Output = SHA-256( input buffer ).
int sha2_file (char *path, unsigned char output[32], int is224)
 Output = SHA-256( file contents ).
void sha2_finish (sha2_context *ctx, unsigned char output[32])
 SHA-256 final digest.
void sha2_hmac (unsigned char *key, int keylen, unsigned char *input, int ilen, unsigned char output[32], int is224)
 Output = HMAC-SHA-256( hmac key, input buffer ).
void sha2_hmac_finish (sha2_context *ctx, unsigned char output[32])
 SHA-256 HMAC final digest.
void sha2_hmac_starts (sha2_context *ctx, unsigned char *key, int keylen, int is224)
 SHA-256 HMAC context setup.
void sha2_hmac_update (sha2_context *ctx, unsigned char *input, int ilen)
 SHA-256 HMAC process buffer.
int sha2_self_test (int verbose)
 Checkup routine.
void sha2_starts (sha2_context *ctx, int is224)
 SHA-256 context setup.
void sha2_update (sha2_context *ctx, unsigned char *input, int ilen)
 SHA-256 process buffer.


Function Documentation

void sha2 ( unsigned char *  input,
int  ilen,
unsigned char  output[32],
int  is224 
)

Output = SHA-256( input buffer ).

Parameters:
input buffer holding the data
ilen length of the input data
output SHA-224/256 checksum result
is224 0 = use SHA256, 1 = use SHA224

int sha2_file ( char *  path,
unsigned char  output[32],
int  is224 
)

Output = SHA-256( file contents ).

Parameters:
path input file name
output SHA-224/256 checksum result
is224 0 = use SHA256, 1 = use SHA224
Returns:
0 if successful, 1 if fopen failed, or 2 if fread failed

void sha2_finish ( sha2_context ctx,
unsigned char  output[32] 
)

SHA-256 final digest.

Parameters:
ctx SHA-256 context
output SHA-224/256 checksum result

void sha2_hmac ( unsigned char *  key,
int  keylen,
unsigned char *  input,
int  ilen,
unsigned char  output[32],
int  is224 
)

Output = HMAC-SHA-256( hmac key, input buffer ).

Parameters:
key HMAC secret key
keylen length of the HMAC key
input buffer holding the data
ilen length of the input data
output HMAC-SHA-224/256 result
is224 0 = use SHA256, 1 = use SHA224

void sha2_hmac_finish ( sha2_context ctx,
unsigned char  output[32] 
)

SHA-256 HMAC final digest.

Parameters:
ctx HMAC context
output SHA-224/256 HMAC checksum result

void sha2_hmac_starts ( sha2_context ctx,
unsigned char *  key,
int  keylen,
int  is224 
)

SHA-256 HMAC context setup.

Parameters:
ctx HMAC context to be initialized
key HMAC secret key
keylen length of the HMAC key
is224 0 = use SHA256, 1 = use SHA224

void sha2_hmac_update ( sha2_context ctx,
unsigned char *  input,
int  ilen 
)

SHA-256 HMAC process buffer.

Parameters:
ctx HMAC context
input buffer holding the data
ilen length of the input data

int sha2_self_test ( int  verbose  ) 

Checkup routine.

Returns:
0 if successful, or 1 if the test failed

Referenced by main().

void sha2_starts ( sha2_context ctx,
int  is224 
)

SHA-256 context setup.

Parameters:
ctx context to be initialized
is224 0 = use SHA256, 1 = use SHA224

void sha2_update ( sha2_context ctx,
unsigned char *  input,
int  ilen 
)

SHA-256 process buffer.

Parameters:
ctx SHA-256 context
input buffer holding the data
ilen length of the input data


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